Corner notching die



Nov. 2, 1965 L. E. RUTz 3,215,017

CORNER NOTCHING DIE Filed May 24, 1963 2 Sheets-Sheet 1 2a, I: 7% 92 x31' /2| LEON RUTZ g #/ZSMMMOLM w Il Il' Il' ATTORNEYS Nov. 2, 1965 E. Ru'rz 3,215,017

CORNER NOTCHING DIE Filed May 24, 1965 2 Sheets-Sheet 2 INVENTOR LEON E. RUTZ ATTORNEYS United States Patent O M 3,215,017 CRNER NTCHING DIE Leon E. Rutz, Lake City, Minn., assignor to Di-Acro Corporation, Lake City, Minn., a corporation of Minnesota Filed May 24, 1963, Ser. No. 283,024 7 Claims. (Cl. 83-685) The herein disclosed invention relates to corner notching dies and has for an object to provide a die whereby square corners and corners with tabs may be formed.

Another object of the invention resides in providing a die which may be adjusted to form corner tabs of various dimensions.

A still further object of the invention resides in providing a die in which the end of the tab at the vertex of the corner may be automatically removed in the blanking of the corner.

An object of the invention resides in providing a die in which the inner corner of the tab may be removed along a line forming an angle of one hundred and thirtyve degrees with reference to the adjoining edge.

Other objects of the invention reside in the novel construction and arrangements of parts and in the details of construction hereinafter illustrated and/or described.

In the drawings:

FIG. l is a side elevational view of a punch press illustrating an embodiment of the invention applied thereto.

FIG. 2 is a front elevational view of the punch press illustrating the construction ofthe punch and drawn to the same scale as FIG. 1.

FIG. 3 is a plan sectional view taken on line 3 3 of FIG. 2 and looking upwardly and drawn to a greater scale than FIG. 2.

FIG. 4 is a plan sectional view taken on line 4 4 of FIG. 1 and drawn to the same scale as FIG .3.

FIG. 5 is a fragmentary elevational sectional View taken on line 5 5 of FIG. 2 and drawn to a greater scale than FIG. 3.

FIG. 6 is a plan sectional view taken on line 6 6 of FIG. 5 and drawn to the same scale as FIG. 5.

FIG. 7 is a plan sectional View taken on line 7 7 of FIG. l and drawn to the same scale as FIG. 5.

K FIG. 8 is a fragmentary elevational sectional View taken on line 8 8 of FIG. 4 and drawn to the same scale as FIG. 5.

FIG. 9 is a fragmentary elevational sectional View taken on line 9 9 of FIG. 4 and drawn to the same scale as FIG. 5.

FIG. l0 is a plan view of a portion of a sheet cut with the dies arranged as shown in FIG. 4.

FIG. ll is a fragmentary perspective view of a box illustrating a corner formed from the sheet shown in FIG. 10.

In referring to the invention in the claims, the word die has been used to describe the invention. It will, however, be understood that the term is used in its broadest sense to include either the die proper or the punch.

For the purpose of illustrating the invention, an ordinary punch press A is employed which is stationed on a table B or other suitable support.

The punch press A consists of a base and a super structure 30 attached thereto. The base 20 is best shown in FIG. 4 and comprises a hollow diamond shaped rectangular portion 21 constructed with inner arms 22 and with outer arms 23 extending outwardly from the arms 22 and of dimensions sufcient to support the various dies to be used with the press. Issuing rearwardly from the portion 21 is a body 24 and to which the super structure 30 is attached. This body has issuing outwardly from its flanges 25 which are located at the bottom of the same an on opposite sides thereof. The entire base rests upon 3,Zl5,0l7 Patented Nov. 2, 1965 lCe the table B and is bolted thereto by means of bolts 26 which pass through the flanges 24 and through said table.

The super structure 30 comprises an arm 31 which is constructed as a casting and which has a columnar portion 32 overlying the body 24 of the base 20. These parts are secured together by means of cap screws 33 which extend through flanges 29 on the portion 32 and which are screwed into the body 24 of base 20. The arm 31 further comprises an overhanging portion 34 which overlies the base 20 and is spaced therefrom. This portion has a fiat vertical guideway 35 on it and along which a triangular shaped plunger 36 travels. This plunger is held in position and guided by means of a guide block 37 having a V-shaped groove 38 in the same. Flanges 39 on said block, overlie ilanges 41 formed on the overhanging portion 34 which are tapped to receive cap screws 42 which extend through the flanges 39. The lower end of the plunger 36 has attached to it a mounting plate 43. For this purpose a triangular socket 68 is formed inthe upper portion of the plate 43 which receives the lower end of the plunger 36. A cap screw 69 extending through said plate at the locality of said socket is screwed into the plunger 36 and holds the parts assembled. The plate 43- is triangular in form and has edges 44, 45 and 46 parallel to the surfaces of said plunger and spaced therefrom to leave marginal portions 47 and 48 at the forward sides of said mounting plate and to which the punch of the invention is attached. 3

The plunger 36 is reciprocated by means of an actuating mechanism 5% best shown in FIGS. 1, 2 and 5. For this purpose, the overhanging portion 34 of the arm 30,' at a locality above the guideway 35, is formed with two ears 51, defining therebetween a groove 52. Received in this groove is a cam 53 which is rotatably mounted on a shaft 54 journalled in bearings 55 formed in the ears 51. The cam 53 has an arcuate slot 56 formed in the same which has a cam face 57. The cam 53 is received within a slot 58 in the upper end of the plunger 36. Disposed within the slot 56 is a roller 59 which serves as a cam follower. This roller is received within a slot 58 in the plunger 36 and is rotatably mounted on a pin 61 extending through the portions 62 of the plunger 36 formed by the slot 58 as best shown in FIG. 5. The threaded end 63 of a handle 64 is Screwed into a threaded socket 65 formed in the cam 53. An adjusting screw 66 is screwed into a threaded socket 67 in said cam and extends into the slot 56. This screw is adapted to engage the roller 59 and to limit the downward movement of the plunger 36.

The invention comprises a punch 70 and a die 90 with which the punch cooperates. The punch 70 is shown in detail in FIGS. 3 and 7 and comprises two blades 71 and 72. These blades are plate-like in form and are elongated. The blade 71 has an outer side-cutting edge 73 and an end-cutting edge 74 disposed at an angle of 45 with respect to the cutting edge 73. Blade 72 similarly has an outer side-cutting edge 75 and an end-cutting edge 76. The blades 71 and 72 overlie the marginal portions` 47 and 48 of the mounting plate 43 and are held attached thereto by means of bolts 77 and 7S which extend through slots 81 and 82 in the marginal portions 47 and 48 and which are screwed into `said blades. Washers 83 encircling said bolts engage the upper surface 0f the mounting plate 43 and serve to clamp the parts together. The two blades may be slid longitudinally along the slots 81 and 82 and the end edges 74 and 76 brought into contact.

The die best shown in FIGS. 2, 4 and 8 utilizes a bolster plate 91 which is attached to the base 20 by means of bolts 92. These bolts extend through slots 93 in said plate and are screwed into the base portion 21. These bolts adjustably support the bolster plate 91 with reference to the mounting plate 43 carrying the punch 3 70. The die 90 further consists of two blades 94 and 95 which overlie the bolster plate 91 and are attached thereto by means of bolts 96. These bolts have heads 104 received in sockets 105 in said blades as shown in FIG. 9 and extend through slots 97 in the bolster plate 91 and have mounted on them washers 128 and nuts 129 disposed below said bolster plate. The blade 94 is constructed with an inward lateral cutting edge 98 and with an end cutting edge 99. The blade 95 is similarly constructed with an inner lateral cutting edge 101 and with an end cutting edge 102. The end cutting edges make angles of 135 with reference to the cutting edges 98 and 101 and are adapted to be brought into contact with one another as shown in FIG. 4. Mounted on the bolster `plate 91 adjacent the blades 94 and 95 is table 103. This table is attached to the bolster plate 91 by means of cap screws 106. The table 103 lies in close position to the blade 94 and to the blade 95.` The blade 95 may be slid outwardly of the blade 94 and to receive the tip 107 of this blade a notch 108 is formed in said table. The table 103 is of the same thickness as the blades 94 and 95 so that all of these parts lie ush with one another and so that the metal to be sheared may lie flat upon the same. For positioning the sheet metal to be notched on the die 90, two gauges 121 and 122 are employed. These gauges are identical in construction, excepting that one is left handed and one is right handed and only the gauge 121 will be described. This gauge has a straight edge 123 along which the work is positioned and is so disposed upon the table 103 that the edge 123 is normal to the edge 98 of the blade 94. The said gauge has two slots 125 and 126 in it and which are parallel to the edge 98. Screws 127 encircled by washers 128 pass through these slots and are screwed into any of a number of tapped holes 129 in the table 103. Grooves 137 and 138 in the table 103 parallel with the edges 98 and 101 of blades 94 and 95 are engaged by pins 139 on the gauges 121 and 122. By means of this construction, the work can be accurately positioned relative to the cutting edges of the punch and die. Mounted on the table 103 are two scales 131 and 132. These scales are visible through windows 133 formed in the gauges 121 and 122.` These scales assist in moving the dies to properly position the work relative to the cutting edges of the same.

The operation of the invention is as follows: When a square notch is to be cut in the metal, the blades are adjusted so that the corners formed between the cutting edges of the same register with one another. In such case the blades 94 and 95 are positioned so that the cutting edges 99 and 102 lie opposite one another throughout their extent and the two corners between the cutting edges of said blades are directly opposite one another. If, however, a tab is desired on the sheet of work which would overlie the adjoining portion of the work, the dies are adjusted as shown in FIG. 4. In this case, the blade 94 is pulled back and the blade 95 advanced until a notch 134 is formed between the blades. A portion of the work stamped with the die arranged as shown in FIG. 4 is illustrated in FIG. and indicated by the reference numeral 141. The punch and die cut out a corner 142 of the work and in addition a V-shaped notch 143. This leaves a tab 144 extending outwardly from a line normal to the one edge 145 of the work and extending through the vertex 146 of the notch 143. Upon folding the metal along the lines 147 and 148 passing through the vertex 146, a corner may be formed in the work such as illustrated in FIG. 11. By folding the tab 144 along a line 151 offset the thickness of the metal from line 148 the tab 144 is caused to overlie a portion 149 of the work upon the exterior surface thereof. This permits the making of a clean fold at the corner and eliminating the un-v wanted metal which would interfere with the forming of the fold and detract from the appearance of the corner. It will be readily comprehended that the width of the tab 144 will be determined by the amount that the blades and 71 project outwardly beyond the blades 94 and 72.

The advantages of the invention are manifest. A single set of dies may be used to form corners having attached flaps or abutting edges. The dimensions of the aps may be varied to suit the requirements. The device may be applied to existing punch presses without appreciable alteration or reconstruction thereof.

Changes in the specific form of the invention, as herein described, may be made within the scope of what is claimed without departing from the spirit of the invention.

Having described the invention, what is claimed as new and desired to be protected by Letters Patent is:

1. In combination, a corner notching die comprising (a) a support,

(b) a rst elongated cutting blade carried by said support and having (c) an inner side-cutting edge and (d) an end-cutting edge angularly disposed relative to the side-cutting edge,

(e) a second elongated cutting blade carried by said support and having (f) an inner side-cutting edge angularly disposed relative the side-cutting edge of said first cutting blade and (g) an end-cutting edge engaging the end-cutting edge of said rst-cutting blade,

(h) said blades being relatively adjustable for mounting with the vertex of the cutting edges of one blade engaging the end cutting edge of the other blade at various portions along the end cutting edge of the' other blade,

(i) means for clamping the blades to said support in adjusted position with the end edges of the blades in contact, and

(j) a punch for cooperation with said die blades.

2. In combination, a corner notching die comprising (a) a support,

(b) a rst elongated cutting blade carried by said sup port and having (c) an inner side-cutting edge and (d) an end-cutting edge angularly disposed relative to the side-cutting edge,

(e) a second elongated cutting blade carried by said support and having (f) an inner side-cutting edge angularly disposed rela tive the side-cutting edge of said first cutting blade and (g) an end-cutting edge engaging the end-cutting edge of said rst cutting blade and extending along the same and colinear with reference thereto, with the vertexes between the cutting edges of each blade being spaced from one another to form a notch between the endV cutting edge of one blade and the side cutting edge of the other blade,

(h) means for guiding said blades for adjustment relative to one another along the end engaging edges thereof,

(i) means for clamping the blades to said support in adjusted position with the end edges of the blades in contact throughout an appreciable portion of the length of said end edges to vary the length of the notch, and

- (j) a punch for cooperation with said die blades.

3. In combination, a corner notching die comprising (a) a support,

(b) a rst elongated cutting blade carried by said support and having (c) an inner side-cutting edge and (d) an end-cutting edge disposed at an angle of substantially relative to said side-cutting edgey (e) a second elongated cutting blade carried by said support and having (f) an inner side-cutting edge disposed at an angle of substantially 90 relative the side-cutting edge of said rst cutting blade and (g) an end-cutting edge engaging the end-cutting edge of said rst cutting blade,

(h) and disposed at an angle of substantially 135 relative to the side-cutting edge of said second blade,

(i) said blades being relatively adjustable for mounting with the vertex of the cutting edges of one blade engaging the end cutting edge of the other blade at various positions along the end cutting edge of the other blade,

(j) means for clamping the blades to said support in adjusted position with the end edges of the blades in contact, and

(k) a punch for cooperation with said die blades.

4. In combination, `a corner notching die comprising (a) a support,

(b) a lirst elongated cutting blade carried by said support and having (c) an inner side-cutting edge and (d) an end-cutting edge angularly disposed relative to the side-cutting edge,

(e) a second elongated cutting blade carried by said support and having (f) an inner side-cutting edge angularly disposed relative the side-cutting edge of said rst cutting blade and (g) an end-cutting edge engaging the end-cutting edge of said rst cutting blade,

(h) said blades being relatively adjustable for movement along the end edges thereof,

(i) means for clamping the blades to said support in ladjusted position with the end edges of the blades in contact, and

(j) a punch for cooperation with said die blades and comprising,

(k) a third elongated cutting blade having (l) an outer side-cutting edge cooperating with the side-cutting edge of the iirst named blade and (m) an angularly disposed end-cutting edge engageable with the end-cutting edge of said second named blade,

(n) a fourth elongated cutting blade having (o) an out-er side-cutting edge cooperating with the side-cutting edge of the second named blade and (p) an angularly disposed end-cutting edge engageable with the end-cutting edge of said rst named blade.

5. In combination, a corner notching die comprising:

(a) a support,

(b) two cutting blades carried by said support and each having substantially identical ends, each end formed with (c) a side cutting edge and (d) an end cutting edge,

(e) said edges of each blade forming the same angle with one another and of an angle of over 90,

(f) said blades being arranged with their end cutting edges contacting and with their end edges being colinear,

(g) means for supporting said blades on said support with the vertex of the cutting edges of one blade disposed intermediate the ends of the end cutting edge of the other blade and (h) a punch for cooperation with said die blades.

6. In combination, a corner notching die comprising:

(a) a support,

(b) two cutting blades carried by said support and each having substantially identical ends, each end formed with (c) a side cutting edge and (d) an end cutting edge,

(e) said edges of each blade forming the same angle with one another and of an angle of over said blades being arranged with their end cutting edges contacting and with their end cutting edges colinear,

(g) means for supporting said blades on said support with the vertex of the cutting edges of one blade disposed intermediate the ends of the end cutting edge of the other blade and (h) a similarly constructed punch for cooperation with said die blades.

7. In combination, a corner notching die comprising:

(a) a support,

(b) two cutting blades carried by said support and each having substantially identical ends, each end formed with (c) a side cutting edge and (d) an end cutting edge,

(e) said edges of each blade forming the same angle with one another and of an angle of over 90,

(f) said blades being arranged with their end cutting edges contacting and with their end edges being colinear,

(g) means for supporting said blades for positioning relative to one another with the vertex of the edges of said first blade at selected different positions between the end cutting edge of the second blade to produce dilerent lengths of cuts.

References Cited by the Examiner UNITED STATES PATENTS 66,436 7/ 67 Wolf 83-699 1,351,115 8/20 Morse 83-700 1,365,070 1/21 Zealand 83-700 1,447,247 3/23 Hilsdorf 83-700 1,753,978 4/30 Wood 83--628 1,781,111 11/30 Klaucke 83-700 ANDREW R. IUHASZ, Primary Examiner.

HUNTER C. BOURNE, JR., Examiner. 

1. IN COMBINATION, A CORNER NOTCHING DIE COMPRISING (A) A SUPPORT, (B) A FIRST ELONGATED CUTTING BLADE CARRIED BY SAID SUPPORT AND HAVING (C) AN INNER SIDE-CUTTING EDGE AND (D) AN END-CUTTING EDGE ANGULARLY DISPOSED REALTIVE TO THE SIDE-CUTTING EDGE, (E) A SECOND ELONGATED CUTTING BLADE CARRIED BY SAID SUPPORT AND HAVING (F) AN INNER SIDE-CUTTING EDGE ANGULARLY DISPOSED RELATIVE THE SIDE-CUTTING EDGE OF SAID FIRST CUTTING BLADE AND 